概述

本篇文章介绍如何使用STM32HAL库，内部Flash在特定页读写保护示例。

硬件：STM32F103CBU6最小系统板
软件：Keil 5.29 + STM32CubeMX5.6.1

一、使用方法

通过参阅《STM32中文参考手册》得知，不同型号的芯片对应FLASH大小不一样，如下所示：

在《STM32中文参考手册》pdf文档中找到，第2.3.3小节：嵌入式闪存，对应的页数30。

这里我使用的是STM32F103CBU6的FLASH是128k，通过手册得知是属于中容量，所以只需看下面FLASH地址分配图与每一页对应的大小（字节）即可。

想更详细的了解，请阅读《STM32中文参考手册》，网上大把可以下载，这里就给出此文档的下载链接了。

二、STM32CubeMx配置

三、Examples

打开STM32CubeMx生成的keil工程，新建bsp文件夹，同时分别新建bsp_readWriteProtect.c与bsp_readWriteProtect.h文件，并把这两个文件，添加keil工程中来即可。

添加头文件路径

1、bsp_readWriteProtect.h文件

#ifndef __BSP_READWRITEPROTECT_H
#define __BSP_READWRITEPROTECT_H
#ifdef __cplusplusextern "C" {
#endif#define   WRITE_PROTECTION_DISABLE  1
#define     WRITE_PROTECTION_ENABLE   1#define  PASSED      1
#define     FAILED      0
#define     TestStatus  int//写入的起始地址与结束地址
#define FLASH_USER_START_ADDR ((uint32_t)0x08008000)
#define FLASH_USER_END_ADDR     ((uint32_t)0x0800C000)#define FLASH_PAGE_TO_BE_PROTECTED (OB_WRP_PAGES0TO3 | OB_WRP_PAGES4TO7 | OB_WRP_PAGES8TO11 | OB_WRP_PAGES12TO15 | \OB_WRP_PAGES16TO19 | OB_WRP_PAGES20TO23 | OB_WRP_PAGES24TO27 | OB_WRP_PAGES28TO31 | \OB_WRP_PAGES32TO35 | OB_WRP_PAGES36TO39 | OB_WRP_PAGES40TO43 | OB_WRP_PAGES44TO47 | \OB_WRP_PAGES48TO51 | OB_WRP_PAGES52TO55 | OB_WRP_PAGES56TO59 | OB_WRP_PAGES60TO63  )/* ALL PAGES */
//#define FLASH_PAGE_TO_BE_PROTECTED (OB_WRP_PAGES0TO3 | OB_WRP_PAGES4TO7 | OB_WRP_PAGES8TO11 | OB_WRP_PAGES12TO15 | \
//                                  OB_WRP_PAGES16TO19 | OB_WRP_PAGES20TO23 | OB_WRP_PAGES24TO27 | OB_WRP_PAGES28TO31 | \
//                                  OB_WRP_PAGES32TO35 | OB_WRP_PAGES36TO39 | OB_WRP_PAGES40TO43 | OB_WRP_PAGES44TO47 | \
//                                  OB_WRP_PAGES48TO51 | OB_WRP_PAGES52TO55 | OB_WRP_PAGES56TO59 | OB_WRP_PAGES60TO63 | \
//                                  OB_WRP_PAGES64TO67 | OB_WRP_PAGES68TO71 | OB_WRP_PAGES72TO75 | OB_WRP_PAGES76TO79 | \
//                                  OB_WRP_PAGES80TO83 | OB_WRP_PAGES84TO87 | OB_WRP_PAGES88TO91 | OB_WRP_PAGES92TO95 | \
//                                  OB_WRP_PAGES96TO99 | OB_WRP_PAGES100TO103 | OB_WRP_PAGES104TO107 | OB_WRP_PAGES108TO111 | \
//                                  OB_WRP_PAGES112TO115 | OB_WRP_PAGES116TO119 | OB_WRP_PAGES120TO123 | OB_WRP_PAGES124TO127 )void FLASH_Test(void);#endif

2、bsp_readWriteProtect.c文件

#include "bsp_readWriteProtect.h"
#include "stdio.h"
#include "stm32f1xx_hal.h"FLASH_OBProgramInitTypeDef  OptionsBytesStruct;
FLASH_EraseInitTypeDef          EraseInitStruct;uint32_t Address = 0x00; //记录写入的地址
uint32_t DATA_32 = 0x3210ABCD; //记录写入的数据
uint32_t PageError = 0;void FLASH_Test(void)
{printf("Beginning of the test\r\n");/* 初始化测试状态 */ TestStatus MemoryProgramStatus = PASSED;/* 解锁 Flash 以启用闪存控制寄存器访问*/HAL_FLASH_Unlock();/* 解锁选项字节*/HAL_FLASH_OB_Unlock();/* 获取页面写保护状态*/HAL_FLASHEx_OBGetConfig(&OptionsBytesStruct);#if WRITE_PROTECTION_DISABLE     #if 0   /* 检查所需页面是否已被写保护*/if ((OptionsBytesStruct.WRPPage & OB_WRP_ALLPAGES) != OB_WRP_ALLPAGES) {/*恢复写保护页面 */OptionsBytesStruct.OptionType = OPTIONBYTE_WRP;OptionsBytesStruct.WRPState = OB_WRPSTATE_DISABLE;OptionsBytesStruct.WRPPage = OB_WRP_ALLPAGES;if (HAL_FLASHEx_OBProgram(&OptionsBytesStruct) != HAL_OK) {while (1) {//printf("Run failed\r\n");}}/* 生成系统重置以加载新选项字节值*/HAL_FLASH_OB_Launch();}#else/* 检查所需页面是否已被写保护*/if ((OptionsBytesStruct.WRPPage & FLASH_PAGE_TO_BE_PROTECTED) != FLASH_PAGE_TO_BE_PROTECTED) {/*恢复写保护页面 */OptionsBytesStruct.OptionType = OPTIONBYTE_WRP;OptionsBytesStruct.WRPState = OB_WRPSTATE_DISABLE;OptionsBytesStruct.WRPPage = FLASH_PAGE_TO_BE_PROTECTED;if (HAL_FLASHEx_OBProgram(&OptionsBytesStruct) != HAL_OK) {while (1) {//printf("Run failed\r\n");}}/* 生成系统重置以加载新选项字节值*/HAL_FLASH_OB_Launch();}#endif
#elif defined WRITE_PROTECTION_ENABLE /* 检查所需页面是否尚未写保护*/if (((~OptionsBytesStruct.WRPPage) & FLASH_PAGE_TO_BE_PROTECTED )   != FLASH_PAGE_TO_BE_PROTECTED) {/* 启用页面写保护*/OptionsBytesStruct.OptionType = OPTIONBYTE_WRP;OptionsBytesStruct.WRPState = OB_WRPSTATE_ENABLE;OptionsBytesStruct.WRPPage = FLASH_PAGE_TO_BE_PROTECTED; if (HAL_FLASHEx_OBProgram(&OptionsBytesStruct) != HAL_OK) {while (1) {//LED1_ONprintf("Run failed\r\n");}}/* 生成系统重置以加载新选项字节值*/HAL_FLASH_OB_Launch();}
#endif /* WRITE_PROTECTION_DISABLE *//*锁定选项字节*/printf("Lock option byte\r\n");HAL_FLASH_OB_Lock();/* 所选页面未被写保护*/if ((OptionsBytesStruct.WRPPage & FLASH_PAGE_TO_BE_PROTECTED) != FLASH_PAGE_TO_BE_PROTECTED) {/*填写 EraseInit 结构*/EraseInitStruct.TypeErase = FLASH_TYPEERASE_PAGES;EraseInitStruct.PageAddress = FLASH_USER_START_ADDR;EraseInitStruct.NbPages = (FLASH_USER_END_ADDR - FLASH_USER_START_ADDR)    / FLASH_PAGE_SIZE;if (HAL_FLASHEx_Erase(&EraseInitStruct, &PageError) != HAL_OK){/*页面擦除时发生错误。用户可以在这里添加一些代码来处理这个错误PageError 将包含有问题的页面，然后知道此页面上的代码错误，用户可以调用函数'HAL_FLASH_GetError（） '*/while (1) {printf("Run failed\r\n");}}/*由 FLASH_USER_START_ADDR 和 FLASH_USER_END_ADDR 定义的地址处的 DATA_32 FLASH 字程序 */Address = FLASH_USER_START_ADDR;while (Address < FLASH_USER_END_ADDR) {if (HAL_FLASH_Program(FLASH_TYPEPROGRAM_WORD, Address, DATA_32) == HAL_OK) {Address = Address + 4;} else {while (1) {printf("Run failed\r\n");}}}/*检查书面数据的正确性*/ Address = FLASH_USER_START_ADDR; while (Address < FLASH_USER_END_ADDR) {if ((*(__IO uint32_t*) Address) != DATA_32) {MemoryProgramStatus = FAILED;}Address += 4;}} else {/*所需页面受写保护 *//* 检查是否允许在此页面中写入 */Address = FLASH_USER_START_ADDR;if (HAL_FLASH_Program(FLASH_TYPEPROGRAM_WORD, Address, DATA_32)!= HAL_OK) {/* 编程期间返回错误。 *//* 检查 WRPERR 标志是否设置良好 */if (HAL_FLASH_GetError() == HAL_FLASH_ERROR_WRP) {MemoryProgramStatus = FAILED;} else {while (1) {printf("Run failed\r\n");}}} else {while (1) {printf("Run failed\r\n");}}}HAL_FLASH_Lock();/*检查程序数据是否存在问题*/if (MemoryProgramStatus == PASSED) {//printf("Run successful\r\n");} else {while (1) {printf("Run failed\r\n");}}while (1) {}
}

3、mian.c文件

/* USER CODE BEGIN Header */
/********************************************************************************* @file           : main.c* @brief          : Main program body******************************************************************************* @attention** <h2><center>&copy; Copyright (c) 2020 STMicroelectronics.* All rights reserved.</center></h2>** This software component is licensed by ST under BSD 3-Clause license,* the "License"; You may not use this file except in compliance with the* License. You may obtain a copy of the License at:*                        opensource.org/licenses/BSD-3-Clause********************************************************************************/
/* USER CODE END Header *//* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "usart.h"
#include "gpio.h"/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "bsp_readWriteProtect.h"
#include "stdio.h"
/* USER CODE END Includes *//* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD *//* USER CODE END PTD *//* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD *//* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM *//* USER CODE END PM *//* Private variables ---------------------------------------------------------*//* USER CODE BEGIN PV *//* USER CODE END PV *//* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP *//* USER CODE END PFP *//* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 *//* USER CODE END 0 *//*** @brief  The application entry point.* @retval int*/
int main(void)
{/* USER CODE BEGIN 1 *//* USER CODE END 1 *//* MCU Configuration--------------------------------------------------------*//* Reset of all peripherals, Initializes the Flash interface and the Systick. */HAL_Init();/* USER CODE BEGIN Init *//* USER CODE END Init *//* Configure the system clock */SystemClock_Config();/* USER CODE BEGIN SysInit *//* USER CODE END SysInit *//* Initialize all configured peripherals */MX_GPIO_Init();MX_USART1_UART_Init();/* USER CODE BEGIN 2 */FLASH_Test();/* USER CODE END 2 *//* Infinite loop *//* USER CODE BEGIN WHILE */while (1){/* USER CODE END WHILE *//* USER CODE BEGIN 3 */}/* USER CODE END 3 */
}/*** @brief System Clock Configuration* @retval None*/
void SystemClock_Config(void)
{RCC_OscInitTypeDef RCC_OscInitStruct = {0};RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};/** Initializes the CPU, AHB and APB busses clocks */RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;RCC_OscInitStruct.HSEState = RCC_HSE_ON;RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;RCC_OscInitStruct.HSIState = RCC_HSI_ON;RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK){Error_Handler();}/** Initializes the CPU, AHB and APB busses clocks */RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK){Error_Handler();}
}/* USER CODE BEGIN 4 *//* USER CODE END 4 *//*** @brief  This function is executed in case of error occurrence.* @retval None*/
void Error_Handler(void)
{/* USER CODE BEGIN Error_Handler_Debug *//* User can add his own implementation to report the HAL error return state *//* USER CODE END Error_Handler_Debug */
}#ifdef  USE_FULL_ASSERT
/*** @brief  Reports the name of the source file and the source line number*         where the assert_param error has occurred.* @param  file: pointer to the source file name* @param  line: assert_param error line source number* @retval None*/
void assert_failed(uint8_t *file, uint32_t line)
{ /* USER CODE BEGIN 6 *//* User can add his own implementation to report the file name and line number,tex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) *//* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT *//************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

四、运行结果

指定页写保护
修改：bsp_readWriteProtect.h文件

下载代码运行：

编译，下载程序如下所示：

解除无法下载问题，使用ST-Link Utility工具

擦除失败

解除擦除问题：

再次擦除芯片，可以成功擦除。

传送门->代码
（注：提供的代码，与文章给出的有些地方需要做修改，按照文章给出代码即可）

五、总结

好了，就介绍到此。

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概述